[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 77.126568][ T27] audit: type=1800 audit(1584669674.107:25): pid=9336 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 77.154014][ T27] audit: type=1800 audit(1584669674.107:26): pid=9336 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 77.214122][ T27] audit: type=1800 audit(1584669674.117:27): pid=9336 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.180' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 563.924102][ T1138] INFO: task syz-executor057:9498 blocked for more than 143 seconds. [ 563.924121][ T1138] Not tainted 5.6.0-rc6-syzkaller #0 [ 563.924127][ T1138] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 563.924133][ T1138] syz-executor057 D28392 9498 9497 0x20024004 [ 563.924156][ T1138] Call Trace: [ 563.924346][ T1138] ? __schedule+0x934/0x1f90 [ 563.924373][ T1138] ? __sched_text_start+0x8/0x8 [ 563.924404][ T1138] schedule+0xd0/0x2a0 [ 563.924426][ T1138] schedule_preempt_disabled+0xf/0x20 [ 563.924440][ T1138] __mutex_lock+0x7ab/0x13c0 [ 563.924512][ T1138] ? fb_open+0xd3/0x430 [ 563.924535][ T1138] ? mutex_trylock+0x2c0/0x2c0 [ 563.924557][ T1138] ? __mutex_unlock_slowpath+0xe2/0x660 [ 563.924621][ T1138] ? chrdev_open+0xc4/0x5c0 [ 563.924671][ T1138] ? lock_downgrade+0x7f0/0x7f0 [ 563.924699][ T1138] ? fb_open+0xd3/0x430 [ 563.924710][ T1138] fb_open+0xd3/0x430 [ 563.924727][ T1138] ? get_fb_info.part.0+0x80/0x80 [ 563.924740][ T1138] chrdev_open+0x219/0x5c0 [ 563.924754][ T1138] ? rwlock_bug.part.0+0x90/0x90 [ 563.924769][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.924800][ T1138] do_dentry_open+0x4a2/0x1250 [ 563.924817][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.924860][ T1138] ? security_inode_permission+0xc4/0xf0 [ 563.924874][ T1138] ? chown_common+0x550/0x550 [ 563.924889][ T1138] ? inode_permission+0xab/0x500 [ 563.924915][ T1138] path_openat+0x122a/0x32b0 [ 563.924952][ T1138] ? path_mountpoint.isra.0+0x370/0x370 [ 563.924964][ T1138] ? __lock_acquire+0x14bd/0x3ca0 [ 563.924984][ T1138] ? __lock_acquire+0x14bd/0x3ca0 [ 563.925013][ T1138] do_filp_open+0x192/0x260 [ 563.925031][ T1138] ? may_open_dev+0xf0/0xf0 [ 563.925066][ T1138] ? do_raw_spin_lock+0x129/0x2e0 [ 563.925097][ T1138] ? _raw_spin_unlock+0x24/0x40 [ 563.925135][ T1138] ? __alloc_fd+0x46d/0x600 [ 563.925164][ T1138] do_sys_openat2+0x54c/0x740 [ 563.925184][ T1138] ? file_open_root+0x3d0/0x3d0 [ 563.925219][ T1138] do_sys_open+0xc3/0x140 [ 563.925234][ T1138] ? filp_open+0x70/0x70 [ 563.925281][ T1138] ? fpregs_mark_activate+0x320/0x320 [ 563.925328][ T1138] ? trace_hardirqs_off_caller+0x55/0x230 [ 563.925362][ T1138] do_fast_syscall_32+0x270/0xe8f [ 563.925409][ T1138] entry_SYSENTER_compat+0x70/0x7f [ 563.925446][ T1138] INFO: task syz-executor057:9499 blocked for more than 143 seconds. [ 563.925454][ T1138] Not tainted 5.6.0-rc6-syzkaller #0 [ 563.925459][ T1138] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 563.925465][ T1138] syz-executor057 D28392 9499 9496 0x20020004 [ 563.925485][ T1138] Call Trace: [ 563.925505][ T1138] ? __schedule+0x934/0x1f90 [ 563.925530][ T1138] ? __sched_text_start+0x8/0x8 [ 563.925560][ T1138] schedule+0xd0/0x2a0 [ 563.925579][ T1138] schedule_preempt_disabled+0xf/0x20 [ 563.925592][ T1138] __mutex_lock+0x7ab/0x13c0 [ 563.925610][ T1138] ? fb_open+0xd3/0x430 [ 563.925633][ T1138] ? mutex_trylock+0x2c0/0x2c0 [ 563.925655][ T1138] ? __mutex_unlock_slowpath+0xe2/0x660 [ 563.925668][ T1138] ? chrdev_open+0xc4/0x5c0 [ 563.925689][ T1138] ? lock_downgrade+0x7f0/0x7f0 [ 563.925716][ T1138] ? fb_open+0xd3/0x430 [ 563.925727][ T1138] fb_open+0xd3/0x430 [ 563.925744][ T1138] ? get_fb_info.part.0+0x80/0x80 [ 563.925757][ T1138] chrdev_open+0x219/0x5c0 [ 563.925771][ T1138] ? rwlock_bug.part.0+0x90/0x90 [ 563.925786][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.925816][ T1138] do_dentry_open+0x4a2/0x1250 [ 563.925834][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.925852][ T1138] ? security_inode_permission+0xc4/0xf0 [ 563.925866][ T1138] ? chown_common+0x550/0x550 [ 563.925880][ T1138] ? inode_permission+0xab/0x500 [ 563.925907][ T1138] path_openat+0x122a/0x32b0 [ 563.925943][ T1138] ? path_mountpoint.isra.0+0x370/0x370 [ 563.925954][ T1138] ? __lock_acquire+0x14bd/0x3ca0 [ 563.925974][ T1138] ? __lock_acquire+0x14bd/0x3ca0 [ 563.926003][ T1138] do_filp_open+0x192/0x260 [ 563.926020][ T1138] ? may_open_dev+0xf0/0xf0 [ 563.926053][ T1138] ? do_raw_spin_lock+0x129/0x2e0 [ 563.926085][ T1138] ? _raw_spin_unlock+0x24/0x40 [ 563.926098][ T1138] ? __alloc_fd+0x46d/0x600 [ 563.926127][ T1138] do_sys_openat2+0x54c/0x740 [ 563.926147][ T1138] ? file_open_root+0x3d0/0x3d0 [ 563.926183][ T1138] do_sys_open+0xc3/0x140 [ 563.926197][ T1138] ? filp_open+0x70/0x70 [ 563.926218][ T1138] ? fpregs_mark_activate+0x320/0x320 [ 563.926235][ T1138] ? trace_hardirqs_off_caller+0x55/0x230 [ 563.926259][ T1138] do_fast_syscall_32+0x270/0xe8f [ 563.926280][ T1138] entry_SYSENTER_compat+0x70/0x7f [ 563.926317][ T1138] INFO: task syz-executor057:9500 blocked for more than 143 seconds. [ 563.926324][ T1138] Not tainted 5.6.0-rc6-syzkaller #0 [ 563.926329][ T1138] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 563.926335][ T1138] syz-executor057 D28392 9500 9494 0x20020004 [ 563.926353][ T1138] Call Trace: [ 563.926374][ T1138] ? __schedule+0x934/0x1f90 [ 563.926399][ T1138] ? __sched_text_start+0x8/0x8 [ 563.926430][ T1138] schedule+0xd0/0x2a0 [ 563.926448][ T1138] schedule_preempt_disabled+0xf/0x20 [ 563.926461][ T1138] __mutex_lock+0x7ab/0x13c0 [ 563.926478][ T1138] ? fb_open+0xd3/0x430 [ 563.926501][ T1138] ? mutex_trylock+0x2c0/0x2c0 [ 563.926523][ T1138] ? __mutex_unlock_slowpath+0xe2/0x660 [ 563.926536][ T1138] ? chrdev_open+0xc4/0x5c0 [ 563.926558][ T1138] ? lock_downgrade+0x7f0/0x7f0 [ 563.926585][ T1138] ? fb_open+0xd3/0x430 [ 563.926596][ T1138] fb_open+0xd3/0x430 [ 563.926613][ T1138] ? get_fb_info.part.0+0x80/0x80 [ 563.926626][ T1138] chrdev_open+0x219/0x5c0 [ 563.926640][ T1138] ? rwlock_bug.part.0+0x90/0x90 [ 563.926654][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.926684][ T1138] do_dentry_open+0x4a2/0x1250 [ 563.926701][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.926720][ T1138] ? security_inode_permission+0xc4/0xf0 [ 563.926734][ T1138] ? chown_common+0x550/0x550 [ 563.926748][ T1138] ? inode_permission+0xab/0x500 [ 563.926774][ T1138] path_openat+0x122a/0x32b0 [ 563.926810][ T1138] ? path_mountpoint.isra.0+0x370/0x370 [ 563.926831][ T1138] ? __lock_acquire+0x14bd/0x3ca0 [ 563.926860][ T1138] do_filp_open+0x192/0x260 [ 563.926877][ T1138] ? may_open_dev+0xf0/0xf0 [ 563.926905][ T1138] ? do_raw_spin_lock+0x129/0x2e0 [ 563.926936][ T1138] ? _raw_spin_unlock+0x24/0x40 [ 563.926950][ T1138] ? __alloc_fd+0x46d/0x600 [ 563.926979][ T1138] do_sys_openat2+0x54c/0x740 [ 563.926998][ T1138] ? file_open_root+0x3d0/0x3d0 [ 563.927034][ T1138] do_sys_open+0xc3/0x140 [ 563.927053][ T1138] ? filp_open+0x70/0x70 [ 563.927074][ T1138] ? fpregs_mark_activate+0x320/0x320 [ 563.927090][ T1138] ? trace_hardirqs_off_caller+0x55/0x230 [ 563.927114][ T1138] do_fast_syscall_32+0x270/0xe8f [ 563.927136][ T1138] entry_SYSENTER_compat+0x70/0x7f [ 563.927171][ T1138] INFO: task syz-executor057:9501 blocked for more than 143 seconds. [ 563.927178][ T1138] Not tainted 5.6.0-rc6-syzkaller #0 [ 563.927183][ T1138] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 563.927189][ T1138] syz-executor057 D28288 9501 9492 0x20020004 [ 563.927208][ T1138] Call Trace: [ 563.927229][ T1138] ? __schedule+0x934/0x1f90 [ 563.927254][ T1138] ? __sched_text_start+0x8/0x8 [ 563.927284][ T1138] schedule+0xd0/0x2a0 [ 563.927303][ T1138] schedule_preempt_disabled+0xf/0x20 [ 563.927315][ T1138] __mutex_lock+0x7ab/0x13c0 [ 563.927333][ T1138] ? fb_open+0xd3/0x430 [ 563.927355][ T1138] ? mutex_trylock+0x2c0/0x2c0 [ 563.927378][ T1138] ? __mutex_unlock_slowpath+0xe2/0x660 [ 563.927391][ T1138] ? chrdev_open+0xc4/0x5c0 [ 563.927412][ T1138] ? lock_downgrade+0x7f0/0x7f0 [ 563.927439][ T1138] ? fb_open+0xd3/0x430 [ 563.927450][ T1138] fb_open+0xd3/0x430 [ 563.927467][ T1138] ? get_fb_info.part.0+0x80/0x80 [ 563.927480][ T1138] chrdev_open+0x219/0x5c0 [ 563.927493][ T1138] ? rwlock_bug.part.0+0x90/0x90 [ 563.927508][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.927538][ T1138] do_dentry_open+0x4a2/0x1250 [ 563.927555][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.927574][ T1138] ? security_inode_permission+0xc4/0xf0 [ 563.927588][ T1138] ? chown_common+0x550/0x550 [ 563.927602][ T1138] ? inode_permission+0xab/0x500 [ 563.927628][ T1138] path_openat+0x122a/0x32b0 [ 563.927664][ T1138] ? path_mountpoint.isra.0+0x370/0x370 [ 563.927675][ T1138] ? __lock_acquire+0x14bd/0x3ca0 [ 563.927695][ T1138] ? __lock_acquire+0x14bd/0x3ca0 [ 563.927724][ T1138] do_filp_open+0x192/0x260 [ 563.927742][ T1138] ? may_open_dev+0xf0/0xf0 [ 563.927770][ T1138] ? do_raw_spin_lock+0x129/0x2e0 [ 563.927802][ T1138] ? _raw_spin_unlock+0x24/0x40 [ 563.927822][ T1138] ? __alloc_fd+0x46d/0x600 [ 563.927851][ T1138] do_sys_openat2+0x54c/0x740 [ 563.927871][ T1138] ? file_open_root+0x3d0/0x3d0 [ 563.927907][ T1138] do_sys_open+0xc3/0x140 [ 563.927921][ T1138] ? filp_open+0x70/0x70 [ 563.927941][ T1138] ? fpregs_mark_activate+0x320/0x320 [ 563.927958][ T1138] ? trace_hardirqs_off_caller+0x55/0x230 [ 563.927982][ T1138] do_fast_syscall_32+0x270/0xe8f [ 563.928003][ T1138] entry_SYSENTER_compat+0x70/0x7f [ 563.928039][ T1138] INFO: task syz-executor057:9502 blocked for more than 143 seconds. [ 563.928046][ T1138] Not tainted 5.6.0-rc6-syzkaller #0 [ 563.928056][ T1138] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 563.928061][ T1138] syz-executor057 D28392 9502 9495 0x20020004 [ 563.928080][ T1138] Call Trace: [ 563.928100][ T1138] ? __schedule+0x934/0x1f90 [ 563.928125][ T1138] ? __sched_text_start+0x8/0x8 [ 563.928156][ T1138] schedule+0xd0/0x2a0 [ 563.928175][ T1138] schedule_preempt_disabled+0xf/0x20 [ 563.928187][ T1138] __mutex_lock+0x7ab/0x13c0 [ 563.928205][ T1138] ? fb_open+0xd3/0x430 [ 563.928228][ T1138] ? mutex_trylock+0x2c0/0x2c0 [ 563.928250][ T1138] ? __mutex_unlock_slowpath+0xe2/0x660 [ 563.928263][ T1138] ? chrdev_open+0xc4/0x5c0 [ 563.928284][ T1138] ? lock_downgrade+0x7f0/0x7f0 [ 563.928311][ T1138] ? fb_open+0xd3/0x430 [ 563.928322][ T1138] fb_open+0xd3/0x430 [ 563.928339][ T1138] ? get_fb_info.part.0+0x80/0x80 [ 563.928352][ T1138] chrdev_open+0x219/0x5c0 [ 563.928366][ T1138] ? rwlock_bug.part.0+0x90/0x90 [ 563.928380][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.928410][ T1138] do_dentry_open+0x4a2/0x1250 [ 563.928427][ T1138] ? cdev_put.part.0+0x50/0x50 [ 563.928446][ T1138] ? security_inode_permission+0xc4/0xf0 [ 563.928460][ T1138] ? chown_common+0x550/0x550 [ 563.928473][ T1138] ? inode_permission+0xab/0x500 [ 563.928500][ T1138] path_openat+0x122a/0x32b0 [ 563.928536][ T1138] ? path_mountpoint.isra.0+0x370/0x370 [ 563.928547][ T1138] ? __lock_acquire+0x14bd/0x3ca0 [ 563.928567][ T1138] ? __lock_acquire+0x14bd/0x3ca0 [ 563.928596][ T1138] do_filp_open+0x192/0x260 [ 563.928613][ T1138] ? may_open_dev+0xf0/0xf0 [ 563.928642][ T1138] ? do_raw_spin_lock+0x129/0x2e0 [ 563.928673][ T1138] ? _raw_spin_unlock+0x24/0x40 [ 563.928686][ T1138] ? __alloc_fd+0x46d/0x600 [ 563.928715][ T1138] do_sys_openat2+0x54c/0x740 [ 563.928735][ T1138] ? file_open_root+0x3d0/0x3d0 [ 563.928770][ T1138] do_sys_open+0xc3/0x140 [ 563.928784][ T1138] ? filp_open+0x70/0x70 [ 563.928805][ T1138] ? fpregs_mark_activate+0x320/0x320 [ 563.928821][ T1138] ? trace_hardirqs_off_caller+0x55/0x230 [ 563.928845][ T1138] do_fast_syscall_32+0x270/0xe8f [ 563.928867][ T1138] entry_SYSENTER_compat+0x70/0x7f [ 563.928899][ T1138] [ 563.928899][ T1138] Showing all locks held in the system: [ 563.928916][ T1138] 1 lock held by khungtaskd/1138: [ 563.928921][ T1138] #0: ffffffff897accc0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x260 [ 563.928973][ T1138] 1 lock held by rsyslogd/9374: [ 563.928977][ T1138] #0: ffff888095d3c860 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 [ 563.929005][ T1138] 2 locks held by getty/9464: [ 563.929009][ T1138] #0: ffff8880a8e99090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 563.929068][ T1138] #1: ffffc900017eb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 563.929095][ T1138] 2 locks held by getty/9465: [ 563.929100][ T1138] #0: ffff888093e35090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 563.929124][ T1138] #1: ffffc900017fb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 563.929150][ T1138] 2 locks held by getty/9466: [ 563.929155][ T1138] #0: ffff8880a8dc6090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 563.929178][ T1138] #1: ffffc9000183b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 563.929205][ T1138] 2 locks held by getty/9467: [ 563.929209][ T1138] #0: ffff888091df0090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 563.929232][ T1138] #1: ffffc9000181b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 563.929259][ T1138] 2 locks held by getty/9468: [ 563.929263][ T1138] #0: ffff88808e74d090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 563.929287][ T1138] #1: ffffc9000186b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 563.929314][ T1138] 2 locks held by getty/9469: [ 563.929318][ T1138] #0: ffff88808c9c9090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 563.929342][ T1138] #1: ffffc9000187b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 563.929368][ T1138] 2 locks held by getty/9470: [ 563.929373][ T1138] #0: ffff88808e9b9090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 563.929396][ T1138] #1: ffffc900017bb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 563.929424][ T1138] 2 locks held by syz-executor057/9493: [ 563.929432][ T1138] 1 lock held by syz-executor057/9498: [ 563.929436][ T1138] #0: ffff8880a3b0f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 563.929462][ T1138] 1 lock held by syz-executor057/9499: [ 563.929467][ T1138] #0: ffff8880a3b0f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 563.929492][ T1138] 1 lock held by syz-executor057/9500: [ 563.929497][ T1138] #0: ffff8880a3b0f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 563.929523][ T1138] 1 lock held by syz-executor057/9501: [ 563.929527][ T1138] #0: ffff8880a3b0f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 563.929553][ T1138] 1 lock held by syz-executor057/9502: [ 563.929557][ T1138] #0: ffff8880a3b0f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 563.929579][ T1138] [ 563.929584][ T1138] ============================================= [ 563.929584][ T1138] [ 563.929590][ T1138] NMI backtrace for cpu 0 [ 563.929603][ T1138] CPU: 0 PID: 1138 Comm: khungtaskd Not tainted 5.6.0-rc6-syzkaller #0 [ 563.929610][ T1138] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 563.929614][ T1138] Call Trace: [ 563.929679][ T1138] dump_stack+0x188/0x20d [ 563.929702][ T1138] nmi_cpu_backtrace.cold+0x70/0xb1 [ 563.929760][ T1138] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 563.929777][ T1138] nmi_trigger_cpumask_backtrace+0x231/0x27e [ 563.929842][ T1138] watchdog+0xa8c/0x1010 [ 563.929866][ T1138] ? reset_hung_task_detector+0x30/0x30 [ 563.929903][ T1138] kthread+0x357/0x430 [ 563.929917][ T1138] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 563.929933][ T1138] ret_from_fork+0x24/0x30 [ 563.929968][ T1138] Sending NMI from CPU 0 to CPUs 1: [ 563.930644][ C1] NMI backtrace for cpu 1 [ 563.930650][ C1] CPU: 1 PID: 9493 Comm: syz-executor057 Not tainted 5.6.0-rc6-syzkaller #0 [ 563.930656][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 563.930659][ C1] RIP: 0010:vga16fb_fillrect+0x9c1/0x1960 [ 563.930669][ C1] Code: 45 31 f6 48 89 04 24 8d 43 ff 48 83 c0 01 48 89 44 24 08 e8 a1 51 bb fd 31 ff 89 de 31 ed e8 06 53 bb fd 85 db 4d 89 ec 74 22 8a 51 bb fd 45 88 34 24 83 c5 01 89 df 49 83 c4 01 89 ee e8 66 [ 563.930673][ C1] RSP: 0018:ffffc900020974b8 EFLAGS: 00000216 [ 563.930680][ C1] RAX: 0000000000000000 RBX: 0000000000000050 RCX: ffffffff83b6d3aa [ 563.930684][ C1] RDX: 000000000000002f RSI: 0000000000000050 RDI: 0000000000000004 [ 563.930689][ C1] RBP: 000000000000002f R08: ffff88809cccc1c0 R09: ffffed10147621dc [ 563.930694][ C1] R10: ffffed10147621db R11: ffff8880a3b10edf R12: ffff8880000a002f [ 563.930698][ C1] R13: ffff8880000a0000 R14: 0000000000000000 R15: 00000000ec40d007 [ 563.930703][ C1] FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:0000000009b1e840 [ 563.930707][ C1] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 563.930711][ C1] CR2: ffffffffff600400 CR3: 00000000a217d000 CR4: 00000000001406e0 [ 563.930716][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 563.930720][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 563.930723][ C1] Call Trace: [ 563.930725][ C1] ? memcpy+0x35/0x50 [ 563.930728][ C1] bit_clear_margins+0x2d5/0x4a0 [ 563.930731][ C1] ? bit_bmove+0x210/0x210 [ 563.930734][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 563.930737][ C1] fbcon_clear_margins+0x1de/0x240 [ 563.930740][ C1] fbcon_switch+0xd1b/0x1740 [ 563.930744][ C1] ? fbcon_set_def_font+0x370/0x370 [ 563.930747][ C1] ? fbcon_cursor+0x477/0x650 [ 563.930750][ C1] ? bit_clear+0x4e0/0x4e0 [ 563.930753][ C1] ? is_console_locked+0x5/0x10 [ 563.930756][ C1] ? fbcon_set_origin+0x26/0x50 [ 563.930759][ C1] redraw_screen+0x2a8/0x770 [ 563.930762][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 563.930765][ C1] ? respond_string+0x290/0x290 [ 563.930768][ C1] ? fbcon_set_palette+0x3b1/0x4a0 [ 563.930771][ C1] fbcon_modechanged+0x5bd/0x780 [ 563.930774][ C1] fbcon_update_vcs+0x3a/0x50 [ 563.930777][ C1] fb_set_var+0xad0/0xd40 [ 563.930780][ C1] ? fb_blank+0x190/0x190 [ 563.930783][ C1] ? preempt_schedule_common+0x5e/0xc0 [ 563.930786][ C1] ? ___preempt_schedule+0x16/0x18 [ 563.930789][ C1] ? lock_acquire+0x197/0x420 [ 563.930792][ C1] ? do_fb_ioctl+0x335/0x7d0 [ 563.930795][ C1] do_fb_ioctl+0x390/0x7d0 [ 563.930797][ C1] ? fb_mmap+0x550/0x550 [ 563.930801][ C1] ? lock_downgrade+0x7f0/0x7f0 [ 563.930804][ C1] ? quarantine_put+0x119/0x1c0 [ 563.930806][ C1] ? kfree+0x1eb/0x2b0 [ 563.930810][ C1] ? tomoyo_path_number_perm+0x411/0x4d0 [ 563.930813][ C1] ? lockdep_hardirqs_on+0x417/0x5d0 [ 563.930816][ C1] ? tomoyo_path_number_perm+0x238/0x4d0 [ 563.930820][ C1] ? tomoyo_execute_permission+0x470/0x470 [ 563.930823][ C1] ? trace_hardirqs_off+0x50/0x220 [ 563.930826][ C1] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 563.930829][ C1] ? do_vfs_ioctl+0x506/0x12c0 [ 563.930832][ C1] fb_compat_ioctl+0x305/0xc50 [ 563.930835][ C1] ? fb_release+0x140/0x140 [ 563.930838][ C1] ? do_sys_open+0xc3/0x140 [ 563.930841][ C1] ? fb_release+0x140/0x140 [ 563.930844][ C1] __ia32_compat_sys_ioctl+0x23d/0x2b0 [ 563.930847][ C1] do_fast_syscall_32+0x270/0xe8f [ 563.930850][ C1] entry_SYSENTER_compat+0x70/0x7f [ 563.943974][ T1138] Kernel panic - not syncing: hung_task: blocked tasks [ 563.943991][ T1138] CPU: 0 PID: 1138 Comm: khungtaskd Not tainted 5.6.0-rc6-syzkaller #0 [ 563.943999][ T1138] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 563.944004][ T1138] Call Trace: [ 563.944025][ T1138] dump_stack+0x188/0x20d [ 563.944100][ T1138] panic+0x2e3/0x75c [ 563.944115][ T1138] ? add_taint.cold+0x16/0x16 [ 563.944137][ T1138] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 563.944152][ T1138] ? ___preempt_schedule+0x16/0x18 [ 563.944171][ T1138] ? watchdog+0xa8c/0x1010 [ 563.944187][ T1138] ? nmi_trigger_cpumask_backtrace+0x214/0x27e [ 563.944207][ T1138] watchdog+0xa9d/0x1010 [ 563.944231][ T1138] ? reset_hung_task_detector+0x30/0x30 [ 563.944247][ T1138] kthread+0x357/0x430 [ 563.944260][ T1138] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 563.944278][ T1138] ret_from_fork+0x24/0x30 [ 563.946032][ T1138] Kernel Offset: disabled [ 565.807717][ T1138] Rebooting in 86400 seconds..